Read it and sweep it. Start off your line, read the through ball early, and race out to clear it before the striker arrives.
A through ball is played in behind and the keeper races out to sweep and clear it. Emphasise a high starting position, reading the pass early, and a decisive sprint to get there first. Vary the weight of the through ball. Rotate players.
Fork it into your private drills, then change the animation, adjust positions, swap equipment, or drop it into a session block.